ChaHα8

ChaHα8 (also written ChaHa8 when Greek letters are unavailable) is a brown dwarf 522 light years from Earth discovered in 2000.[3]

ChaHα8
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 11h 07m 46.102s[1]
Declination −77° 40 08.94[1]
Apparent magnitude (V) 20.1[1]
Distance522 ly
(160[2] pc)
Spectral typeM5.75–M6.5[2]
Other designations
2MASS J11074610-7740089[1]
Database references
SIMBADdata

Planetary/Brown dwarf system

It was found in 2007 to have a low-mass substellar companion in orbit around it.[2] The companion has a mass of 25–31 Jupiter masses and orbits with a period of 5.2 years and an eccentricity of 0.59.[4]

The ChaHα8 system
Companion MassOrbital periodEccentricity
b25-31 MJ1899.3 days0.59

References

  1. "CHSM 10837". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 November 2016.
  2. Joergens, V.; A. Mueller (2007). "16–20 Jupiter mass RV companion orbiting the brown dwarf candidate ChaHa8". The Astrophysical Journal. 666 (2). arXiv:0707.3744. Bibcode:2007ApJ...666L.113J. doi:10.1086/521825. S2CID 119140521.
  3. Comerón, F.; Neuhäuser, R.; Kaas, A. A. (2000). "Probing the brown dwarf population of the Chamaeleon I star forming region". Astronomy and Astrophysics. 359: 269–288. Bibcode:2000A&A...359..269C.
  4. Joergens, V.; Müller, A.; Reffert, S. (2010). "Improved radial velocity orbit of the young binary brown dwarf candidate Cha Hα 8". Astronomy and Astrophysics. 521 (A24): A24. arXiv:1006.2383. Bibcode:2010A&A...521A..24J. doi:10.1051/0004-6361/201014853. S2CID 54989533.
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